UP-5900VS
CIRCUIT DESCRIPTION
5 – 7
7. PCI BUS
7-1. DEVICE NUMBER DECODE
7-2. BUS ARBITRATION
7-3. INTERRUPT REQUEST
PIRQ D is connected to the above PCI device and PCIIRQ0 of PCI
SLOT, and connected to IRQ2 by BIOS.
PIRQ A is connected to PCIIRQ1 of PCI SLOT, and connected to IRQ5
by BIOS.
Interrupt requests which can be used with PCI slot are limited to INTA#
(PCI) and INTB# (PCI). INTC# (PCI) and INTD# (PCI) must not be
used.
PCI Interrupt SelectionPIO
8. SM BUS
9. CPU
Intel's embedded Celeron (RB80526RX566128SL4PC) is used.
The clock frequency of CPU is automatically multiplied in the Chip.
System Bus, Core Frequency
The core voltage of CPU is automatically set by connecting the VID terminal to the power IC.
Voltage Identification Definition
Bus
Device
Number
Func
IDSEL
Device
Remark
0
0000h
0000h
AD11
440BX
Host to PCI Bridge
0001h
0000h
AD12
PCI to PCI Bridge
0007h
0000h
AD18
PIIX4e
PCI to ISA Bridge
0001h
IDE Interface
0002h
USB Interface
0003h
Power Management
000Ah
0000h
AD21
RTL8139C
LAN Controller
0012h
XXXXh
AD29
PCI SLOT
Expansion SLOT
1
0000h
0000h
AD16
L VGA (AGP connection)
Master Device No.
Request allow signal
Device
Device 0
REQ0#, GNT0#
(Not Used)
Device 1
REQ1#, GNT1#
(Not Used)
Device 2
REQ2#, GNT2#
(Not Used)
Device 3
REQ3#, GNT3#
PCI Slot
PIO PCIIRQ
Selection
PCI Interrupt
PIO PCIIRQ0#
IRQ12
INTA#
PIO PCIIRQ1#
IRQ5
INTB#
PIO PCIIRQ2#
Disable
INTC#
PIO PCIIRQ3#
Disable
INTD#
Address
Device
Remark
10100000b
DIMM 0
UP-5900 standard memory supports SPD.
10100010b
DIMM 1
DIMM can be set with SPD.
00110000b
LM84CIM
CPU Temperature SENSOR
11010010b
ICS9248
Clock Generator
PIRQ D
PIRQ A
L
VGA
RTL8139CL PCI SLOT
LAN
PIIX4e
USB
Core Frequency (MHz)
BCLK Frequency (MHz)
Frequency Multiplier
566
66
8.5
VID3
VID2
VID1
VID0
VccCore
Celeron566
0
1
1
1
1.70
Step C